Tubular MFI Zeolite Membranes Made by In-Situ Crystallization

Polycrystalline MFI zeolite membranes were prepared on α-alumina tubular support by hydrothermal treatments at ۴۱۳ K. The synthesized zeolite membranes were characterized by XRD, SEM and single gas permeation. The influence of hydrothermal treatment steps and the calcination time on the zeolite layer formation were investigated. MFI zeolite membrane prepared by four subsequent hydrothermal treatments and calcined at ۶۷۳K for ۳۰ h had optimum quality from morphological and crystalline point of view. The grown MFI zeolite layer was uniform with about ۲۰ µm thickness and well-intergrown zeolite crystals.

کلیدواژه ها:

MFI zeolite ، Membrane ، In-situ crystallization ، Calcination time ، Hydrothermal treatment steps